998998097 has 2 divisors, whose sum is σ = 998998098. Its totient is φ = 998998096.

The previous prime is 998997997. The next prime is 998998127. The reversal of 998998097 is 790899899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 993447361 + 5550736 = 31519^2 + 2356^2 .

It is a cyclic number.

It is not a de Polignac number, because 998998097 - 2¹⁸ = 998735953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998998697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499499048 + 499499049.

It is an arithmetic number, because the mean of its divisors is an integer number (499499049).

Almost surely, 2^998998097 is an apocalyptic number.

It is an amenable number.

998998097 is a deficient number, since it is larger than the sum of its proper divisors (1).

998998097 is an equidigital number, since it uses as much as digits as its factorization.

998998097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26453952, while the sum is 68.

The square root of 998998097 is about 31606.9311544161. The cubic root of 998998097 is about 999.6659207368.

The spelling of 998998097 in words is "nine hundred ninety-eight million, nine hundred ninety-eight thousand, ninety-seven".